Vibrating mirror element, distance measuring apparatus, and projector

a technology of mirror element and rotating mirror, which is applied in the direction of distance measurement, instruments, surveying and navigation, etc., can solve the disadvantageous limitation of the time when the turning angle velocity of the first movable element can be substantially constant, and achieve the effect of easy oscillation and easy formation
US9134115B2Inactive Publication Date: 2015-09-15FUNAI ELECTRIC CO LTD
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
FUNAI ELECTRIC CO LTD
Publication Date
2015-09-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

A vibrating mirror element includes a drive control portion configured to control the driving of a correction drive portion to keep the turning angle velocity of a mirror portion substantially constant by oscillating the mirror portion about an axis at a non-resonance frequency in a direction opposite to a direction in which a resonant drive portion oscillates the mirror portion.
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Description

BACKGROUND OF THE INVENTION

[0001] 1. Field of the Invention

[0002] The present invention relates to a vibrating mirror element, a distance measuring apparatus, and a projector, and more particularly, it relates to a vibrating mirror element, a distance measuring apparatus, and a projector each including a resonant drive portion and a drive control portion controlling the driving of the resonant drive portion.

[0003] 2. Description of the Background Art

[0004] A vibrating mirror element, a distance measuring apparatus, and a projector each including a resonant drive portion and a drive control portion controlling the driving of the resonant drive portion are known in general, as disclosed in Japanese Patent Laying-Open No. 2008-009446.

[0005] Japanese Patent Laying-Open No. 2008-009446 discloses an image-forming apparatus having a resonance type light-deflector (vibrating mirror element) for deflecting a laser light, a driving portion (resonant drive portion) for oscillating a first movable e...

Claims

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